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- 6ES7953-8LG20-0AA0
6ES7953-8LG20-0AA0
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Product Information
Product Describe
MEMORY CARD
SIMATIC S7
N-FLASH
128 KB
3.3 VDC RATING
FOR S7-300/C7/ET 200
SIMATIC S7
N-FLASH
128 KB
3.3 VDC RATING
FOR S7-300/C7/ET 200
Technical specifications for 6ES7953-8LG20-0AA0
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Product Model6ES7953-8LG20-0AA0
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Product ParametersMicro Memory Card - 128 KB
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Tariff Code8537101190
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Country of originGermany
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Place of shipmentXiamen, China
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Estimated Shipping Size2.3x3.1x0.2cm
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ManufacturerSiemens
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Weight0.2 kg
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Memory size128 kbyte
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Number of write/delete operations, min.100 000
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Data retention (after final programming action),min.10 y
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belongs to productS7-300 / ET200
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Factory New
These are new and current items that are procured from the manufacturer. -
New No Package
These parts are new. They have not been used, but their original packaging is no longer available. -
New In Opened Package
These parts are new. They have not been used, but their original packaging has been opened or the packaging is significantly aged. -
New In Sealed Package
Parts are new. They have not been used and still have their original package seal intact. -
New in Original Package
These parts are new. The packages were not originally sealed by their original manufacturer.
Warranty Period & Disclaimer
Amikon is not an authorized distributor unless otherwise specified, representative, or affiliate of the manufacturer of this product. All trademarks and documents are the property of their respective owners and are provided for identification and informational.
FAQs
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What is the 6ES7953-8LG20-0AA0?+The Siemens 6ES7953-8LG20-0AA0 is a 128 KB SIMATIC Micro Memory Card (MMC) designed for SIMATIC S7-300, C7, and ET 200 systems. It operates at 3.3V and is essential for the operation of these CPUs.
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What is the function of this MMC card?+The 6ES7953-8LG20-0AA0 serves as the load memory for S7-300 CPUs, storing the user program, data blocks, and system data.
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Why can't I see a price for this 6ES7953-8LG20-0AA0?+In addition to "new original" " units. we also specialize in the selling "discontinued" and hard to find industrial automation parts which tend to have a fluctuating market value. These fluctuations may make it difficult for us to provide accurate daily prices for parts on our website. Therefore, in an effort to ensure that we always provide you with the best and most accurate price available, our team will source and price your part on an enquiry-by-enquiry basis.
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What are the key technical specs?+It is a 3.3 V NFLASH card with 128 KB of memory, using Flash-EPROM technology. It supports at least 100,000 write/delete operations
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Can I use it in a standard PC card reader?+No. Formatting or writing to the card using a standard third-party USB card reader (e.g., via Windows Explorer) will corrupt the internal system format, making it unreadable by the PLC.
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Product
MORE INFORMATION
Overview
Manuals
Technical notes
Product Applications
Comparison with Related Models
Features:
- SIMATIC S7
- MICRO MEMORY CARD
- FOR S7-300/C7/ET200, 3.3 V NFLASH
- 128 KBYTES
- LOCAL DIAGNOSTIC BUFFER WITH TIMESTAMP
The 6ES7953-8LG20-0AA0 Siemens MICRO MEMORY CARD may still be available for purchase and support from Amikon Limited beyond End-Of-Life (EOL) by the manufacturer (OEM).
Siemens 6ES7953-8LG20-0AA0 MICRO MEMORY CARD Manuals, Datasheets, Drivers, Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
This memory card is a dedicated Micro Memory Card for Siemens SIMATIC S7 series, an N-Flash type with a storage capacity of 128 KB and an operating voltage of 3.3V. Designed as the main memory for S7-300, C7, and ET 200 series PLC systems, it stores user programs, configuration data, parameters, and system data, serving as the core hardware carrier for equipment operation and project loading. When inserted into the CPU, it is used as internal load memory, ensuring permanent data retention without a backup battery after power failure.
It is important to note that this model, 6ES7953-8LG20-0AA0, has been officially declared a "Phase-Out" product by Siemens, with a Product Lifecycle Management (PLM) status of PM490. The official announcement of the complete cessation of supply took effect on October 1, 2019. Therefore, this product has been superseded by subsequent models. The officially designated successor to this memory card is the 6ES7953-8LG31-0AA0. Both are identical in core functionality, being 128 KB SIMATIC S7 micro memory cards suitable for the same S7-300/C7/ET 200 system platforms.
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This content has been produced using multiple sources.Amikon takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
While both cards serve the same function—providing 128 KB of memory for S7-300 and ET 200 CPUs—the 6ES7953-8LG31-0AA0 is the modern, improved successor to the now-obsolete 6ES7953-8LG20-0AA0.
Reliability: The newer LG31 model uses updated NFlash technology, offering 10x more write cycles than the older LG20. This is critical if your PLC frequently writes data to the card (e.g., using SFC 82/83/84 for data logging).
Firmware Updates: Both cards can be used to update CPU firmware, but the LG31 is the version currently supported for all modern S7-300 hardware revisions.
- What Happens Next
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Get the quote now Write Email to: INFO@AMIKON.CNEmail confirmation You will get an email confirming that we have received your enquiry.Dedicated Account Manager One of our team will be in touch to confirm your part(s) specification and condition.Your quote You will receive a comprehensive quote tailored to your specific needs.Need Moore Help? Get fast and efficient help from our experienced sales or customer service teams.
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- Why Choose Amikon Limited?
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When it comes to industrial automation, reliability, speed, and trust matter. At Amikon Limited, we go beyond just supplying parts — we deliver confidence.
- ● Extensive Inventory Reach: Nearly 1 million automation parts at your fingertips, including legacy and obsolete models.
- ● 20+ Years of Expertise: Trusted by engineers, project managers and government companies worldwide for our professional service.
- ● Quality You Can Trust: Each unit is strictly inspected by the warehouse staff to ensure product quality
- ● Fast Global Shipping: We help you minimize downtime with express logistics worldwide.
- ● 1-Year Warranty Available: Peace of mind with every purchase backed by one year warranty guarantee.
Whether you're maintaining legacy systems or building future-ready projects, Amikon Limited is your dependable partner in precision and performance.
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